After reading through the diy forums I'm starting to think the LM3875 isn't that great a chip anymore and the supply voltage will be too high for reliable operation. I plan to drive 2 different pairs of 8 ohm speakers as surround sound on my patio. I also was thinking of finally finishing that Phoenix Systems Parametric Equalizer project from Popular Electronics that I bought pcbs for long ago, and try to use it as some sort of preamp. It's supposed to go in the tape loop. Can I just feed it the headphone out from an mp3 player or Squeezebox Radio? Where's the best place for a volume control?

Hi,
that is a 115/230:28+28Vac transformer.
It will give too high a voltage for a 3886 from 240Vac.
It will probably run the 3886 at just outside it's specification maximum rating when mains voltage is high.

It should just about be OK when run from 220Vac mains supply.

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regards Andrew T.
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